CN115308820A - 半透半反防水膜、光学镜片、成像装置 - Google Patents
半透半反防水膜、光学镜片、成像装置 Download PDFInfo
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Abstract
本发明提供一种半透半反防水膜,至少包括基底层、半透半反层以及防水层;半透半反层由若干层交替层叠的第一折射率膜层以及第二折射率膜层构成;其中,第一折射率层记为H,第二折射率层记为L;交替层叠的顺序为(H‑L)m‑H顺序、(H‑L)m顺序、(L‑H)m顺序或L‑(H‑L)m顺序;其中,m是交替的第一折射率膜层和第二折射率膜层的数量。本发明还提供了一种光学镜片、成像装置。本发明制得的防水膜可直接贴合在镜头表面实现所需光学效果,并且具有防水效果,可以提高镜头元件在高温高湿环境中的稳定性。
Description
技术领域
本发明涉及防水膜领域,尤其涉及一种半透半反防水膜、光学镜片、成像装置。
背景技术
半透半反防水膜被施加于透镜、棱镜等光学部件的表面,主要作用是可用来分配人射光的光通量,使入射光和反射光之比恰好为50/50,此时的分光镜具有最大的分光效率(透射比和反射比的乘积称为分光镜的分光效率)。半透半反防水膜是Pancake折叠光路VR模组中不可或缺的元件,而其一般都是直接通过电子束蒸发镀在光学镜头上。光学镜头的材料一般是PMMA、COC、COP、PC等高分子材料,但大曲面光学塑料耐湿性、膨胀系数大、尺寸稳定性差等缺点导致其直接镀膜后会存在一定形变造成成像系统的不良,并且大曲面树脂基底镀膜在高温高湿环境中存在膜裂的风险。
如此需要现有的防水膜的结构进行改进,设计出一种新型的防水膜以满足需求。
发明内容
为了克服现有技术的不足,本发明的第一个目的是提供一种半透半反防水膜,至少包括基底层、半透半反层以及防水层;所述半透半反层由若干层交替层叠的第一折射率膜层以及第二折射率膜层构成;其中,所述第一折射率层记为H,所述第二折射率层记为L;所述交替层叠的顺序为(H-L)m-H顺序、(H-L)m顺序、(L-H)m顺序或L-(H-L)m顺序;其中,m是交替的第一折射率膜层和第二折射率膜层的数量。
优选地,所述基底层通过以下材料中的至少一种构成:
聚萘二甲酸乙二醇酯、聚对苯二甲酸乙二醇酯、三醋酸纤维素、环烯烃共聚物、环烯烃聚合物、聚碳酸酯。
优选地,所述防水层通过以下材料中的至少一种构成:
Z型全氟聚醚、Y型全氟聚醚、K型全氟聚醚、D型全氟聚醚。
优选地,所述第一折射率膜层通过以下材料中的至少一种构成:
氢化硅、氢化硅锗、碳化硅、五氧化二铌、五氧化二钽以及钛的氧化物。
优选地,所述第二折射率膜层通过以下材料中的至少一种构成:
二氧化硅、氧化铝、一氧化硅、氟化镁、金属银或金属铝。
优选地,所述防水层的静态水滴角≥115°,550nm处折射率n1满足1.1≤n1≤1.8。
优选地,所述第一折射率膜层的550nm处折射率n2满足:2.0≤n3≤4.0;所述第二折射率膜层的550nm的折射率n3满足:0<n2≤1.8。
本发明的第二个目的是提供一种光学镜片,所述光学镜片的至少一侧贴附有如上所述的半透半反防水膜。
本发明的第三个目的是提供一种成像装置,所述成像装置由光学模组构成,所述光学模组还包括如上所述的光学镜片。
优选地,所述光学镜片在可见光波段的反射率R及透过率T满足如下条件:
在400nm-700nm,R/T:50%±2%,R+T≥95%。
相比现有技术,本发明的有益效果在于:本发明提供一种半透半反防水膜,至少包括基底层、半透半反层以及防水层;其中,半透半反层由若干层交替层叠的第一折射率膜层以及第二折射率膜层构成;其中,第一折射率层记为H,第二折射率层记为L;交替层叠的顺序为(H-L)m-H顺序、(H-L)m顺序、(L-H)m顺序或L-(H-L)m顺序;其中,m是交替的第一折射率膜层和第二折射率膜层的数量。本发明还提供了一种光学镜片、成像装置。本发明将卷对卷磁控溅射和卷对卷防水膜蒸发技术相结合,得到半透半反防水膜,直接将其贴合在大曲面树脂镜片上即可实现所需光学效果并提高光学系统稳定性,克服大曲面树脂镜片镀膜不稳定性问题。
本上述说明仅是本发明技术方案的概述,为了能够更清楚了解本发明的技术手段,并可依照说明书的内容予以实施,以下以本发明的较佳实施例并配合附图详细说明如后。本发明的具体实施方式由以下实施例及其附图详细给出。
附图说明
此处所说明的附图用来提供对本发明的进一步理解,构成本申请的一部分,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:
图1为本发明第一实施方式半透半反防水膜结构示意图;
图2为本发明第一实施方式半透半反防水膜分光光谱图;
图3为本发明第二实施方式半透半反防水膜结构示意图;
图4为本发明第二实施方式半透半反防水膜分光光谱图;
图5为本发明第三实施方式半透半反防水膜结构示意图;
图6为本发明第三实施方式半透半反防水膜分光光谱图。
图中:10、防水膜;
11、基底层;12、半透半反层;121、第一折射率膜层;122、第二折射率膜层;13、防水层。
具体实施方式
下面结合附图对本发明做进一步的详细说明,本发明的前述和其它目的、特征、方面和优点将变得更加明显,以令本领域技术人员参照说明书文字能够据以实施。在附图中,为清晰起见,可对形状和尺寸进行放大,并将在所有图中使用相同的附图标记来指示相同或相似的部件。在下列描述中,诸如中心、厚度、高度、长度、前部、背部、后部、左边、右边、顶部、底部、上部、下部等用词为基于附图所示的方位或位置关系。特别地,“高度”相当于从顶部到底部的尺寸,“宽度”相当于从左边到右边的尺寸,“深度”相当于从前到后的尺寸。这些相对术语是为了说明方便起见并且通常并不旨在需要具体取向。涉及附接、联接等的术语(例如,“连接”和“附接”)是指这些结构通过中间结构彼此直接或间接固定或附接的关系、以及可动或刚性附接或关系,除非以其他方式明确地说明。
下面,结合附图以及具体实施方式,对本发明做进一步描述,需要说明的是,在不相冲突的前提下,以下描述的各实施例之间或各技术特征之间可以任意组合形成新的实施例。
现在技术都是将半透半反防水膜直接镀在树脂镜片表面,而大曲面树脂镜片直接镀膜存在面型变化、膜裂、良率低等风险。为解决这一问题,本发明涉及一种半透半反防水膜10,至少包括基底层11、半透半反层12以及防水层13;半透半反层由若干层交替层叠的第一折射率膜层121和第二折射率膜层122构成;其中,第一折射率层记为H,第二折射率层记为L;交替层叠的顺序为(H-L)m-H顺序、(H-L)m-L顺序、(L-H)m顺序、H-(H-L)m顺序或L-(H-L)m顺序;其中,m是交替的第一折射率膜层(H)和第二折射率膜层(L)的数量。该半透半反防水膜兼顾半透半反光学效果同时达到防水的效果,可以贴在光学模组镜片实现模组所需的半透半反效果;且可直接将卷材贴在镜头一侧而实现所需的光学效果,这样可以解决树脂镜头直接镀膜带来的一系列问题。
在一些实施例中,半透半反层设置在半透半反防水膜的底层,即形成起到光学分光作用的功能复合层,即HL的各种堆叠结构复合层;防水层13镀在外侧,目的是减少水汽透过率,提高光学薄膜在高湿环境中的稳定性。
在一些实施例中,基底层通过以下材料中的至少一种构成:
聚萘二甲酸乙二醇酯(PEN)、聚对苯二甲酸乙二醇酯(PET)、三醋酸纤维素(TAC)、环烯烃共聚物(COP)、环烯烃聚合物(COC)、聚碳酸酯(PC)。
在一些实施例中,防水层通过以下材料中的至少一种构成:
Z型全氟聚醚、Y型全氟聚醚、K型全氟聚醚、D型全氟聚醚。
在一些实施例中,第一折射率膜层(H)通过以下材料中的至少一种构成:
氢化硅、氢化硅锗、碳化硅、五氧化二铌、五氧化二钽以及钛的氧化物。
在一些实施例中,第二折射率膜层(L)通过以下材料中的至少一种构成:
二氧化硅、氧化铝、一氧化硅、氟化镁、金属银或金属铝。
在一些实施例中,防水层的静态水滴角(WCA)≥115°,550nm处折射率n1满足1.1≤n1≤1.8。
在一些实施例中,第一折射率膜层(H)的550nm处折射率n2满足:2.0≤n3≤4.0;第二折射率膜层(L)的550nm的折射率n3满足:0<n2≤1.8。
半透半反层12采用卷对卷磁控溅射技术制备,因为卷对卷溅射沉积技术镀成的膜层具有极高的致密性,具有较佳的耐高温高湿性能。防水层13采用卷对卷蒸发技术制备,可以达到高疏水角(118°)。
本发明还涉及一种光学镜片,光学镜片的至少一侧贴附有如上的半透半反防水膜。由于大曲面树脂镜片的直接镀膜存在膜裂、面型变化等风险,直接贴合光学卷材即半透半反防水膜的方案可以规避此问题;更有利于模组光学系统的稳定。
本发明还涉及一种成像装置,该成像装置由光学模组构成,光学模组还包括如上的光学镜片。该光学模组在恒温(85±3)℃、相对湿度为85%±5%的环境下存放96H前后,中心场曲变化量<2u,无发生膜裂现象。在一些实施例中,当光学模组中光学镜片所贴合光学卷材为如上的半透半反防水膜时,该光学镜片在可见光波段的反射率R及透过率T满足如下条件:
在400nm-700nm,R/T:50%±2%,R+T≥95%。
实施例一
如图1所示,一种半透半反防水膜,从下至上依次包括基底层11、半透半反层12以及防水层13;基底层11由零相位的三醋酸纤维素卷材薄膜(TAC)制成;半透半反层12与防水层形成六层膜结构,从基底层11一侧开始,第一层到第五层为第一折射率膜层121和第二折射率膜层122依次堆叠而成,第六层为防水层13。
其中,第一折射率膜层121使用的材料为五氧化二铌;第二折射率膜层122使用的材料为二氧化硅,防水层13所用的材料为含氟硅烷化合物。
应当理解,此处提及的折射率指的是波长550nm的折射率。
六层膜系结构的各膜层物理厚度比为18:25:60:90:60:15,其厚度单位为nm;第一膜层的五氧化二铌层的厚度为15~30nm,第二膜层的二氧化硅层的厚度为15~35nm,第三膜层的五氧化二铌层的厚度为45~70nm,第四膜层二氧化硅层的厚度为75~100nm,第五膜层的五氧化二铌层的厚度为45~70nm,第六膜层即防水层的厚度为10~20nm。
一种光学镜片,光学镜片的至少一侧贴附有半透半反防水膜。本实施方式的半透半反防水膜使得光线在可见光区域光线实现一定程度的分光效果,具体如图2所示,在400-700nm波段,Rave/Tave=47%/53%;配合本实施方式上述各膜层叠放顺序及厚度的设置同时可以达到一定程度的防水效果(疏水角≥118°)。
实施例二
如图3所示,一种半透半反防水膜,从下至上依次包括基底层11、半透半反层12以及防水层13;基底层11由零相位的三醋酸纤维素卷材薄膜(TAC)制成;半透半反层12与防水层形成六层膜结构,从基底层11一侧开始,第一层到第五层为第一折射率膜层121(H)和第二折射率膜层122(L/L2)依次堆叠而成,第六层为防水层13。
其中,第一折射率膜层121使用的材料为五氧化二铌;第二折射率膜层122使用的材料为银(L2)或二氧化硅(L),防水层13所用的材料为含氟硅烷化合物。
应当理解,此处,第二折射率层别采用两种不同的材料,分别标记为L(二氧化硅)和L2(金属银)。
应当理解,此处提及的折射率指的是波长550nm的折射率。
六层膜系结构的各膜层物理厚度比为25:10:45:55:10:15,其厚度单位为nm;第一膜层的五氧化二铌层的厚度为15~35nm,第二膜层的金属银(Ag)的厚度为5~15nm,第三膜层的二氧化硅层的厚度为30~55nm,第四膜层五氧化二铌层层的厚度为45~75nm,第五膜层的二氧化硅层的厚度为5~15nm,第六膜层即防水层的厚度为10~20nm。
一种光学镜片,光学镜片的至少一侧贴附有半透半反防水膜。本实施方式的半透半反防水膜使得光线在可见光区域光线实现一定程度的分光效果,具体如图4所示,在400-700nm波段,Rave/Tave=49.5%/49.5%;分光效果优于实施例一,同时可以保持与实施例一相同的防水效果(疏水角≥118°)。
实施例三
如图5所示,一种半透半反防水膜,从下至上依次包括基底层11、半透半反层12以及防水层13;基底层11由零相位的三醋酸纤维素卷材薄膜(TAC)制成;半透半反层12与防水层形成九层膜结构,从基底层11一侧开始,第一层到第八层为第一折射率膜层121(H)和第二折射率膜层122(L)依次堆叠而成,第九层为防水层13。
其中,第一折射率膜层121使用的材料为五氧化二铌;第二折射率膜层122使用的材料为二氧化硅,防水层13所用的材料为含氟硅烷化合物。
应当理解,此处提及的折射率指的是波长550nm的折射率。
九层膜系结构的各膜层物理厚度比为20:70:30:110:45:125:65:55:15,其厚度单位为nm;第一膜层的五氧化二铌层的厚度为10~35nm,第二膜层的二氧化硅层的厚度为55~85nm,第三膜层的五氧化二铌层的厚度为15~45nm,第四膜层二氧化硅层的厚度为95~135nm,第五膜层的五氧化二铌层的厚度为30~60nm,第六膜层二氧化硅层的厚度为110~140nm,第七膜层的五氧化二铌层的厚度为50~80nm,第八膜层二氧化硅层的厚度为40~70nm,第九膜层即防水层的厚度为10~20nm。
一种光学镜片,光学镜片的至少一侧贴附有半透半反防水膜。本实施方式的半透半反防水膜使得光线在可见光区域光线实现一定程度的分光效果,具体如图6所示,在400-700nm波段,Rave/Tave=50%/50%,分光效果优于实施例二,同时可以保持与实施例一、实施例二相同的防水效果(疏水角≥118°)。
尽管本发明的实施方案已公开如上,但其并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各种适合本发明的领域,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节和这里示出的实施例。
Claims (10)
1.一种半透半反防水膜,其特征在于,至少包括基底层、半透半反层以及防水层;所述半透半反层由若干层交替层叠的第一折射率膜层以及第二折射率膜层构成;其中,所述第一折射率层记为H,所述第二折射率层记为L;所述交替层叠的顺序为(H-L)m-H顺序、(H-L)m顺序、(L-H)m顺序或L-(H-L)m顺序;其中,m是交替的第一折射率膜层和第二折射率膜层的数量。
2.如权利要求1所述的半透半反防水膜,其特征在于,所述基底层通过以下材料中的至少一种构成:
聚萘二甲酸乙二醇酯、聚对苯二甲酸乙二醇酯、三醋酸纤维素、环烯烃共聚物、环烯烃聚合物、聚碳酸酯。
3.如权利要求1所述的半透半反防水膜,其特征在于,所述防水层通过以下材料中的至少一种构成:
Z型全氟聚醚、Y型全氟聚醚、K型全氟聚醚、D型全氟聚醚。
4.如权利要求1所述的半透半反防水膜,其特征在于,所述第一折射率膜层通过以下材料中的至少一种构成:
氢化硅、氢化硅锗、碳化硅、五氧化二铌、五氧化二钽以及钛的氧化物。
5.如权利要求1或4所述的半透半反防水膜,其特征在于,所述第二折射率膜层通过以下材料中的至少一种构成:
二氧化硅、氧化铝、一氧化硅、氟化镁、金属银或金属铝。
6.如权利要求1所述的半透半反防水膜,其特征在于,所述防水层的静态水滴角≥115°,550nm处折射率n1满足1.1≤n1≤1.8。
7.如权利要求1或6所述的半透半反防水膜,其特征在于,所述第一折射率膜层的550nm处折射率n2满足:2.0≤n3≤4.0;所述第二折射率膜层的550nm的折射率n3满足:0<n2≤1.8。
8.一种光学镜片,其特征在于,所述光学镜片的至少一侧贴附有如权利要求1所述的半透半反防水膜。
9.一种成像装置,所述成像装置由光学模组构成,其特征在于,所述光学模组还包括如权利要求8所述的光学镜片。
10.一种如权利要求9所述的成像装置,其特征在于,所述光学镜片在可见光波段的反射率R及透过率T满足如下条件:
在400nm-700nm,R/T:50%±2%,R+T≥95%。
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